Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Mechanical Efficiency of Real Machines

Mechanical Efficiency of Real Machines

The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...

Physical and Chemical Properties of Matter

Physical and Chemical Properties of Matter

The characteristics that enable us to distinguish one substance from another are called properties.

Properties of Transition Metals

Properties of Transition Metals

Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.

The Quantum-Mechanical Model of an Atom

The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.

Reaction Mechanisms

Reaction Mechanisms

Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs.
For instance, the decomposition of ozone appears to follow a mechanism with two steps:

Convolution Properties I

Convolution Properties I

Convolution computations can be simplified by utilizing their inherent properties.
The commutative property reveals that the input and the impulse response of an LTI (Linear Time-Invariant) system can be interchanged without affecting the output:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Bioactive Electrode System With External Connectivity for Electrically Augmented Bone Regeneration.

Advanced healthcare materials·2026

Same author

Closed-Loop Decoding and Intervention of Pain: A Novel BMI Strategy Integrating θ-Band Detection and Mechano-Electro-Biological Coupled Hydrogels.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026

Same author

Soft-Segment-Tuned Dynamic Polyurethanes With Low Compression Set and Recyclability.

Macromolecular rapid communications·2026

Same author

Spider Silk-Like Nanodomain Spacings Enable Mechanically Robust and Healable Elastomers with Record-High Puncture Resistance.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same author

The impact of primary percutaneous coronary intervention timing on prognosis in STEMI patients.

Clinical medicine (London, England)·2026

Same author

Correction: IL-22 inhibits ferroptosis and attenuates ischemia-reperfusion-induced acute kidney injury: Association with activation of the P62-Keap1-Nrf2 signaling pathway.

PloS one·2026

Search research articles

Related Experiment Video

Updated: Jan 26, 2026

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

A Highly Efficient Self-Healing Elastomer with Unprecedented Mechanical Properties.

Luzhi Zhang¹, Zenghe Liu², Xueli Wu³

¹State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)

|April 13, 2019

Summary

This summary is machine-generated.

A new self-healing polyurethane elastomer (Cu-DOU-CPU) shows remarkable room-temperature mechanical strength and rapid, efficient self-repair. This advanced material surpasses existing self-healing elastomers in both performance and recovery capabilities.

Keywords:

dynamic covalent bonds elastomers metal coordination polyurethane self-healing

More Related Videos

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Published on: February 6, 2016

Highly Efficient Transfection of Primary Macrophages with In Vitro Transcribed mRNA

Highly Efficient Transfection of Primary Macrophages with In Vitro Transcribed mRNA

Published on: November 9, 2019

Related Experiment Videos

Last Updated: Jan 26, 2026

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Published on: February 6, 2016

Highly Efficient Transfection of Primary Macrophages with In Vitro Transcribed mRNA

Highly Efficient Transfection of Primary Macrophages with In Vitro Transcribed mRNA

Published on: November 9, 2019

Area of Science:

Materials Science
Polymer Chemistry
Nanotechnology

Background:

Developing self-healing materials with high mechanical strength at ambient conditions remains a significant challenge.
Existing self-healing elastomers often compromise mechanical properties for repair efficiency.

Purpose of the Study:

To engineer a novel polyurethane elastomer with superior self-healing capabilities and robust mechanical properties.
To investigate the role of specific chemical complexes in enhancing material performance.

Main Methods:

Synthesis of a novel copper(II)-dimethylglyoxime-urethane-complex-based polyurethane elastomer (Cu-DOU-CPU).
Characterization of mechanical properties including tensile strength and toughness.
Evaluation of self-healing efficiency at room temperature.
Density functional theory (DFT) calculations to elucidate the mechanism of self-healing.

Main Results:

Cu-DOU-CPU exhibits exceptional tensile strength (14.8 MPa) and toughness (87.0 MJ m⁻³).
The material demonstrates spontaneous room-temperature self-healing, recovering up to 13.8 MPa, exceeding original strength.
DFT calculations confirm Cu(II) coordination accelerates reversible bond dissociation, crucial for self-healing.

Conclusions:

The developed Cu-DOU-CPU is a high-performance self-healing elastomer with unprecedented room-temperature capabilities.
The synergetic effect of triple dynamic bonds and Cu(II) coordination is key to the material's dual performance.
Potential applications include self-healable and stretchable electronics.